The Vedic (Rgvedic primarily) texts are quite different from the Puranic stories we know (and love) today. Does this mean the Puranic deities* we worship and stories we read are false from a Vedic perspective?
*brahmA, sarasvatI, mahAviSNu, lakSmI, shiva, pArvatI, etc. described and decorated in Puranas such as viSNupurANa, shivapurANa, etc.
EDIT: I posted this Question on Quora and got some great answers as well - check out those answers for some more angles to look at this topic from.